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How to do joins in LINQ on multiple fields in single join

I need to do a LINQ2DataSet query that does a join on more than one field (as 13 Answers ...
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Case-insensitive search in Rails model

... You'll probably have to be more verbose here name = "Blue Jeans" model = Product.where('lower(name) = ?', name.downcase).first model ||= Product.create(:name => name) sha...
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ggplot with 2 y axes on each side and different scales

...about Plotting Theory. I either have to convince them to not want that anymore (not always a battle I want to wage), or tell them "the plotting package I'm using doesn't support that." So I'm switching away from ggplot today for this particular project. =( – Ken Williams ...
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[SOLVED] Can't send payload > 23bytes(MTU setted to 128bytes) - #9 by ...

...versation you were having with yourself there The reason you cannot send more than 20 characters is that the BLE data packet size defaults to approx 32 bytes, including it's own header & footer. So yes, a good way to work with that is to send your text via several packets. You can, depending on th...
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Where does Console.WriteLine go in ASP.NET?

... So it is conceptually equivalent to /dev/null, but the implementation is more streamlined: there's no actual I/O taking place with the null device. Also, apart from calling SetOut, there is no way to configure the default. ...
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When should I use a trailing slash in my URL?

... haven't studied this in detail, but it seems that on newer websites, it's more common and "prettier" to omit the slash. – speedplane Jun 4 '16 at 7:07  | ...
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Compare equality between two objects in NUnit

... More Caveat: Implementing GetHashCode() on mutable types will misbehave if you ever use that object as a key. IMHO, overriding Equals(), GetHashCode() and making the object immutable just for testing does not make sense. ...
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MySQL vs MySQLi when using PHP [closed]

... noted that MySQLi only works with MySQL 5+. This isn't really relevant anymore, but when MySQLi came out, MySQL 4 was still the standard. This is part of the reason the extensions are separate, the old MySQL driver staying there for compatibility purposes. – zneak ...
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Auto-reload browser when I save changes to html file, in Chrome?

...ied this answer almost verbatim from here, because I think it's easier and more general than the currently accepted answer here. share | improve this answer | follow ...
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Get item in the list in Scala?

... got it - it's "slice"! Can I convert ArrayBuffer to Vector? Or is there a more generic type I can return from methods? For example in Java I would return List interface. – Andriy Drozdyuk Feb 13 '11 at 3:31 ...